Re: [PATCH v6 1/1] s390/vfio-ap: fix KVM GISC and page leak when queue removed from host config

[sashiko-bot@kernel.org]

> Three related problems exist in the handling of KVM interrupt and page
> resources when a queue is removed from the host's AP configuration
> while assigned to a mediated device (mdev).
> 
> Problem 1:
> ~~~~~~~~~
> AP_RESPONSE_Q_NOT_AVAIL not handled in vfio_ap_mdev_reset_queue()
> 
> When the AP bus removes a queue device whose adapter or domain has
> been removed from the host's AP configuration,
> vfio_ap_mdev_remove_queue() is called. If the queue is still in the
> host's AP configuration at that point, it calls
> vfio_ap_mdev_reset_queue(), which issues a PQAP(ZAPQ). Since the
> adapter is already gone from the host configuration, ap_zapq() returns
> AP_RESPONSE_Q_NOT_AVAIL (0x01). This response code is not handled in
> [ ... ]
> vfio_ap_mdev_unset_kvm().
> 
> Fixes: b9bd10c43456d ("s390/vfio-ap: do not reset queue removed from host config")
> Cc: stable@vger.kernel.org
> Signed-off-by: Anthony Krowiak <akrowiak@linux.ibm.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260818193349.1877940-2-akrowiak@linux.ibm.com?part=1